Train Smarter.
Race Better.
Data-driven tools to dial in your nutrition, pacing, and race day strategy.
Even Splits Lab is where endurance training meets real numbers. Our articles break down how to train, fuel, and race smarter, with simple calculators to dial in your pacing, nutrition, sweat rate, and heart rate zones. Built for runners, cyclists, and triathletes who want data they can actually use.
The Lab Tools
Fuel Strategy
Most athletes under-fuel without knowing it. Find out exactly what your body needs per hour.
Plan FuelSweat Rate
Calculate your hourly fluid target so you replace what you lose, before cramps tell you that you didn’t.
Run TestPacing Strategy
Your finish time is just math. Enter a target time to find your required pace, or enter your pace to see your projected finish.
Find Your PaceHR Zone Finder
Your zones are unique to you. Stop using generic charts and get numbers that actually match your fitness.
Find Your ZonesLatest From the Lab
Brick Workouts Explained: Why They Matter and How to Start
If you’ve registered for your first triathlon, you’ve probably heard someone mention brick workouts. Maybe at a club run, maybe in a Facebook group, maybe in a race forum where everyone seems to already know what everyone else is talking about. A brick workout is simply two disciplines done back to back in a single […]
The Best Gifts for Runners in 2026
Buying gear for a runner sounds easy until you realize they probably already own the essentials. The shoes are sorted. There’s a drawer full of race shirts they’ll never wear again. The GPS watch has been on their wrist since their third half marathon. What they’re missing is the stuff that fills the gaps: the […]
Sodium Intake During a Race: What the Science Actually Says
Walk into any running store and you’ll hear that cramping is a sodium problem. Scroll Reddit for five minutes and you’ll find someone telling you salt pills are a scam. Both sides sound certain, and both sides have numbers. If you’ve ever stood at the start line wondering whether you actually need that second electrolyte […]